Magic is a funny beast in Fedran. Using some of the concepts I got from my various religion classes in college, I decided that no one actually knows how magic works. While there are some consistent rules that are evolving as I write, no technique or system that encompasses everything. That goes for psionics also. Psychic powers is just a different form of magic, telepathy included.
The whole idea of the United Hidanork Tribes started with Elizabeth Moon's The Deeds of Paksenarrion. It was the first time I heard of the term taig to refer to the land itself as a distinct being capable of magic and awareness. I'm not sure about the history of the word (and my Google search isn't good enough to verify) but the idea of the taig had stuck with me ever since I read that scene.